The Circle of Kayless was a part of the ritual to bind demons, or a certain demon, in a book. It was used by the monk Thelonius to seal Moloch the Corruptor within a tome. The circle required more than two people. Forming it was not limited to physical proximity, but could be formed through the internet, as demonstrated by Giles and Jenny Calendar and her other technopagan contacts. Uttering the incantation, "By the power of the Circle of Kayless, I command you, demon...come!" in any language would complete the ritual. Before the ritual, Giles uttered the line, "By the power of the divine, by the essence of the word, I command you."